90 lines
3.2 KiB
C#
90 lines
3.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.Linq;
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namespace Sicentury.Core.Collections
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{
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/// <summary>
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/// Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed.
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class ObservableRangeCollection<T> : ObservableCollection<T>
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{
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the System.Collections.ObjectModel.ObservableCollection(Of T) class.
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/// </summary>
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public ObservableRangeCollection()
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{
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}
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/// <summary>
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/// Initializes a new instance of the System.Collections.ObjectModel.ObservableCollection(Of T) class that contains elements copied from the specified collection.
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/// </summary>
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/// <param name="collection">collection: The collection from which the elements are copied.</param>
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/// <exception cref="System.ArgumentNullException">The collection parameter cannot be null.</exception>
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public ObservableRangeCollection(IEnumerable<T> collection)
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: base(collection)
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{
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}
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#endregion
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/// <summary>
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/// Adds the elements of the specified collection to the end of the ObservableCollection(Of T).
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/// </summary>
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public virtual void AddRange(IEnumerable<T> collection)
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{
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if (collection == null) throw new ArgumentNullException(nameof(collection));
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var startIndex = Count;
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var enumerable = collection.ToList();
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foreach (var i in enumerable)
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Items.Add(i);
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OnCollectionChanged(
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new NotifyCollectionChangedEventArgs(
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NotifyCollectionChangedAction.Reset));
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}
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/// <summary>
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/// Removes the first occurence of each item in the specified collection from ObservableCollection(Of T).
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/// </summary>
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public virtual void RemoveRange(IEnumerable<T> collection)
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{
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if (collection == null) throw new ArgumentNullException(nameof(collection));
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foreach (var i in collection)
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Items.Remove(i);
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OnCollectionChanged(
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new NotifyCollectionChangedEventArgs(
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NotifyCollectionChangedAction.Reset));
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}
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/// <summary>
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/// Clears the current collection and replaces it with the specified item.
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/// </summary>
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public virtual void Replace(T item)
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{
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ReplaceRange(new[] {item});
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}
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/// <summary>
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/// Clears the current collection and replaces it with the specified collection.
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/// </summary>
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public void ReplaceRange(IEnumerable<T> collection)
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{
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if (collection == null) throw new ArgumentNullException(nameof(collection));
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Items.Clear();
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foreach (var i in collection) Items.Add(i);
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OnCollectionChanged(
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new NotifyCollectionChangedEventArgs(
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NotifyCollectionChangedAction.Reset));
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}
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}
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} |